331639985 has 16 divisors (see below), whose sum is σ = 402001920. Its totient is φ = 262637760.

The previous prime is 331639937. The next prime is 331640009. The reversal of 331639985 is 589936133.

It is not a de Polignac number, because 331639985 - 2⁸ = 331639729 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227519 + ... + 228971.

It is an arithmetic number, because the mean of its divisors is an integer number (25125120).

Almost surely, 2^331639985 is an apocalyptic number.

It is an amenable number.

331639985 is a deficient number, since it is larger than the sum of its proper divisors (70361935).

331639985 is a wasteful number, since it uses less digits than its factorization.

331639985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888.

The product of its digits is 524880, while the sum is 47.

The square root of 331639985 is about 18210.9852836138. The cubic root of 331639985 is about 692.1851783982.

The spelling of 331639985 in words is "three hundred thirty-one million, six hundred thirty-nine thousand, nine hundred eighty-five".